<span>A chemical equation is balanced by changing or adding C. numbers in front of molecules, which are called coefficients.
For example:
O2 + 2 H2 ---> 2 H2O (number 2 is added to both sides in order to balance the equation)</span>
Take heat away from oxygen and it becomes liquid oxygen. Take heat away from steam and it becomes liquid water.
Answer: 27.27%
Mass percentage of carbon in carbon dioxide is 4412×100=27. 27%.